abstract.
The Super Dual Auroral Radar Network is a chain of HF radars that monitor plasma dynamics in the
ionosphere. In recent years, SuperDARN has expanded to mid-latitudes in order to provide enhanced coverage during
geomagnetically active periods. However, once the radar was built, a new type of plasma irregularity with low
Doppler velocity was observed on a very frequent (> 50% of nights) basis. Using three years of data from the
Blackstone, VA radar, we have implemented a method for automatically identifying this new type of irregularity.
This has allowed for some statistical analysis, which has revealed some interesting features. Specifically, these
irregularities are confined to local night, are almost entirely subauroral, and are equatorward of the plasmapause
boundary.